XPS Desktops

2 Iron

XPS 8930, is the x4 slot open ended?

Is the x4 slot on the XPS 8930 motherboard open ended, meaning a x16 graphics card can be installed in this x4 slot (and run as x4 of course)?

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5 Iridium

Physically the x4 slot is open ended.  Whether it can run a x16 card?  not certain how much power the x4 slot can supply to the card.

some one said this to “Can I put a 16x graphics card in a 4x slot and it still work?”

Yes. It will work fine. It won’t run quite as fast as it will in a 16x slot, but the performance penalty isn’t 75 percent (4/16), it’s usually in the range of 5 to 10 percent. Modern graphics cards don’t come close to saturating an x16 PCIe lane, and rarely come close to maxing out x8 even under the maximal load scenario.”

redxps630_0-1638728092330.jpeg

 


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5 Iridium

Physically the x4 slot is open ended.  Whether it can run a x16 card?  not certain how much power the x4 slot can supply to the card.

some one said this to “Can I put a 16x graphics card in a 4x slot and it still work?”

Yes. It will work fine. It won’t run quite as fast as it will in a 16x slot, but the performance penalty isn’t 75 percent (4/16), it’s usually in the range of 5 to 10 percent. Modern graphics cards don’t come close to saturating an x16 PCIe lane, and rarely come close to maxing out x8 even under the maximal load scenario.”

redxps630_0-1638728092330.jpeg

 


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2 Iron

Thanks. 

For the video card I have in mind, it will probably supply enough power. I have 2 of these cards in my XPS 8900, where the second x16 slot is wired as x4. But I'm assuming that x16 slot wired as x4 supplies as much power as the x4 slot on the 8930.

Do you know how much power is supplied by the x4 slot on the XPS 8930? The card I have in mind has a 40W max power draw.

Re: Do you know how much power is supplied by the x4 slot on the XPS 8930? The card I have in mind has a 40W max power draw.

I do not know.  Dell does not release such detailed engineering info regularly.

I find the following info on internet for general question.

PCIe x4 and x8 cards can pull as much as 25W from the motherboard's slot while x1 cards are limited to 10W

the PCIe 4x slot used as a graphical interface has a maximum power draw of 25 watts.

when you install a x16 card in an open x4 slot, it effectively draws same current as a x4 card.


9 Rhodium

The slot is not designed to run a video card  Crossfire or SLI and its NOT open ended.

 


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Diagnostics & Tools

See the motherboard pic posted earlier in thread. The x4 slot does look open ended.

People often use x4 slots to run low power graphics cards.

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